diff --git a/paddle/go/pserver/service_test.go b/paddle/go/pserver/service_test.go
index ebeff1fb89cc68b1660a8625b2189f15c8699448..78dd4d6b58c3041ab8de524bcadc62c0a45e467b 100644
--- a/paddle/go/pserver/service_test.go
+++ b/paddle/go/pserver/service_test.go
@@ -65,7 +65,8 @@ func TestFull(t *testing.T) {
 		t.FailNow()
 	}
 
-	// we don't care the content, since it's already optimized with gradient
+	// don't compare content, since it's already changed by
+	// gradient update.
 	params1[0].Content = nil
 	params1[0].Content = nil
 	p.Content = nil